标签：style blog io color ar java sp div on
一,Result type
<package name="resultTypes" namespace="/r" extends="struts-default"> <action name="r1"> <result type="dispatcher">/r1.jsp</result> //服务器跳转，为默认项 </action> <action name="r2"> <result type="redirect">/r2.jsp</result> //客户端跳转，跳转后url变成jsp的路径 </action> <action name="r3"> <result type="chain">r1</result> //服务器跳转可以跳转到action， </action> <action name="r4"> <result type="redirectAction">r2</result> //客户端跳转可以跳转到action </action> </package>
二,global result
<struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <global-results> <result name="mainpage">/main.jsp</result> //全局result </global-results> <action name="index"> <result>/index.jsp</result> </action> <action name="user" class="com.bjsxt.struts2.user.action.UserAction"> <result>/user_success.jsp</result> <result name="error">/user_error.jsp</result> </action> </package> <package name="admin" namespace="/admin" extends="user"> //extends继承user包，可以调用user里面的内容 <action name="admin" class="com.bjsxt.struts2.user.action.AdminAction"> <result>/admin.jsp</result> </action> </package> </struts>
useraction
public class UserAction extends ActionSupport { private int type; public int getType() { return type; } public void setType(int type) { this.type = type; } @Override public String execute() throws Exception { if(type == 1) return "success"; else if (type == 2) return "error"; else return "mainpage"; // 调用全局result } }
AdminAction
public class AdminAction extends ActionSupport { @Override public String execute() throws Exception { return "mainpage"; } }
三,动态结果集
<struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <action name="user" class="com.bjsxt.struts2.user.action.UserAction"> <result>${r}</result> //取值栈中r的值 </action> </package> </struts>
//UserAction .java 一定不要忘了为动态结果的保存值设置set get方法
public class UserAction extends ActionSupport {
private int type;
private String r;
public String getR() {
return r;
}
public void setR(String r) {
this.r = r;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
@Override
public String execute() throws Exception {
if(type == 1) r="/user_success.jsp";
else if (type == 2) r="/user_error.jsp";
return "success";
}
}
四,带参数的result，一次request公用一个值栈，服务器端调用是一次request，客户端两次
<struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <action name="user" class="com.bjsxt.struts2.user.action.UserAction"> <result type="redirect">/user_success.jsp?t=${type}</result> // 客户端调用 ${type}取得action传入值栈中的type值 </action> </package> </struts>
UserAction
public class UserAction extends ActionSupport { private int type; public int getType() { return type; } public void setType(int type) { this.type = type; } @Override public String execute() throws Exception { return "success"; } }
user_success.jsp
<body> User Success! from valuestack: <s:property value="t"/><br/> //由于是客户端调用，不共用一个值栈，所以值栈中为空，不能再值栈中取值 from actioncontext: <s:property value="#parameters.t"/>//只能在actionContext中取值 <s:debug></s:debug> </body>
a) dispatcher（默认）
b) redirect
c) chain
d) redirectAction
2.全局结果集
a) global-results | extends
3.动态结果（了解）
a) 在action中保存一个属性，存储具体的结果location
4.传递参数
a) 客户端跳转才需要传递
b) ${}表达式（不是EL）
标签：style blog io color ar java sp div on
原文地址：http://www.cnblogs.com/enjoy-life-clh/p/4082330.html
